Paper-machine.



C. E. POPE. PAPER MACHINE.

APPLICATION FILED MAR. 6, 1916- 11,214,712. Patnted Feb. 6,1917.

3 SHEETS-SHEET l- WITNESS r INVENTOR. yg fiazkalz gae ATTORNEYS. v

0.1-1, POPE, PAPER MACHINE.

APPLICATION FILED MAR- 6, 19156- EQMJHZ, Patented Feb. 6,1917, -ssuns-swan 2.

INVENTOR.

A TTORNE YS.

0. E. POPE. PAPER MACHINE.

APPLICATION FILED MAR. 6, I916- Patented Feb. 6,1917.

3 SHEETS-SHEET 3.

WITNESS INVENTOR. fiajwifip By '1.

ATTORNEYS.

CHARLES E. POPE, F HOLYOKE, MASSACHUSETTS.

PAPER-MACHINE.

To all whom it may concern:

Be it known that 1, CHARLES E. Porn, a

' citizen of the United States of America, and

. ciated felts or aprons,

residing at Holyoke, in the county of Hampden and State ofMassachusetts, have 1nvented certain new and useful Improvements inPaper-Machines, of which the following is a specification.

This invention relates to high speed paper machines and particularly toan improve arrangement of drying cylinders and assowhereby the web istransferred automatically from one cylinder to the next cylinder. Thisimproved arrangement of drying cylinders also has certain advantageousfeatures relating particularly to the drying function as will beexplained. V

An object of the invention is to provide drying cylinders in an improvedarrangement clia1'acterizedfirst, by the positioning of a lower drierrelatively to an upper drier. whereby the forward end of a fasttraveling web may be stripped and jump from the former t0 the latter ona line closely approximating the horizontal, thus avoiding anyconsiderable climb for the web before it reaches the bight of the upperdrier and its apron; and, second, by the spacing of the successive pairsof. driers whereby the web maypass from an upper drier with both tialdistance, thus to permit the vapor to escape from contact with the web.

Another object of the invention is to provide in an arrangement ofdrying cylinders as described improved means whereby the forward end ofa fast traveling web in passing from one drying cylinder to another maybe stripped from one cylinder and automatically directed into the bightof the next cylinder and its associated apron.

Another object of the invention is .to provide in combination with animproved arrangement of drying cylinders, wherein the successive pairsof driers are so spaced that a web from an upper may pass to a lowerdrier with both sides-exposed for a substantial distance to permit theescape of vapor from the web, means whereby the moisture laden air maybe withdrawn from the spaces on either side of the web, and acirculation set up in said spaces to expedite the drying of the web.

Another object is to'provide, in connec- Specification of LettersPatent.

' Application filed March 6, 1916.

sides exposed for a substan-- doctor 31.

Serial No. 82,409.

tion with the improved arrangement of drying cylinders described,improved means, whereby maining on the drying cylinder after the web isstripped therefrom, may be removed and carried away from the cylinder,thus preventing damage to the web or the aprons by the dropping of anaccumulated mass of emulsified material thereon.

Other objects will appear in the detailed description and annexedclaims.

A single preferred embodiment of the if} vention is shown, forillustrative purposes, in the accompanying drawings, in which- Figure 1is a diagrammatic view of the arrangement of drying cylinders andassociated devices; Fig. 2 is a side elevational view of part of a papermaking machine showing only the parts thereof necessary to anunderstanding of the invention by those skilled in the art; Fig. 3 is adiagrammatic view on an enlarged scale showing in detail the manner inwhich a web is automatically passed from one cylinder to another; Fig.

4 is a fragmentary sectional plan view taken on the line 4-4 of Fig. 3;and Fig. 5 is a sectional elevation of a device which may be used tostrip the end of the web from one cylinder and transfer it to the other.

The feature of the invention by which, on the start of the machine, theweb is automatically transferred from one drying cylinder to anotherwill first be described. As is well-known by those skilled in the art,the web, at the start or after any break in the process of making thepaper, is usually carried through the machine and fed to the driers byhand. Instead of handling the entirewidth of the web it is customary toform on the wire a ribbon, usually at one side of the wire, which iscarried through dust, lint, and like material, re'

Patented Feb. 6, 191%..

the machine and afterward leads the web of .apron 4 carries the web 6from the last press rolls (not shown) to a guide roll 5 adjacent theperiphery of the first drier 11, and the felt returns over other rolls5. In line with the upper roll 5 and between it and the first drier 11is a guide roll 30 provided with a Above and a little beyond the roll.30 is a horizontally arranged pipe 32 connected to a source of air underpressure.

The web 6 traveling in loosened condition on the felt 4: and at highspeed jumps the distance between rolls and 30V and. comes beneath adownwardly directed blast from apertures'in pipe 32. 1 This blast forcesor blows the web downwardly into th e,bight' the press rolls to thefirst drier 11 is claimed and more fully described in my copendingapplication Serial No. 19098,.filed April 5,

1915. This particular means for leading the web from the press rolls tothe first drier 11 is shown simply for illustrative purposes and anyother suitable means may be employed as desired.

The drying cylinders are arranged as shown in Figs. 1 and 2 so that eachlower cylinder -ll of a series is located with its axis vertically,- orapproximately so, below that of its companion cylinder 12 in the upperseries. The upper and lowercylinders are also arranged only a smalldistance apart or in such away that the forward end of the web or ribbon6, as it travels rapidly through the machine, may jump from the lowercylinder to the bight of the upper cylinder and its associated apron,without climbing any appreciable distance so that the web may readily betransferred by its momentum. To' facilitate this transfer, a doctor 40is arranged to strip the ribbon from cylinder 11' as 'it reaches itsupper horizontal travel. The lower guide roll 41 i for the apron l4;directs the latter to upper cylinder 12 from a point adjacent the doctor40, so that, as the ribbon 6 is stripped from drier 11, it will jump byreason of its momentum to the apron 14. i The rapidly tra eling ribbon 6is thus carried to the drier 12,

and this result is automatically'obtained substantially by an improvedand new arrangement of old structures.

If desirable, another form of doctor may be used iii-place of doctor 4C0such, for example, as is shown in Fig. 5. The doctor 60, there shown,has on its lowerface, an

axially extending conduit 62 which is con-= nected to a source ofcompressed air. A series of apertures 61 lead from the conduit 62 to'theupper face of the doctor, whereby air may be blown against the web 6 toassist it to enter theconvergingspace between drier 12 and felt 1 1."This specific form of doctor, however, forms no part of the presentinvention except as an equivalent of the doctor 40 included in the broadcombinawardly in a direction substantially tangential to the lower drierll of the succeeding set. The upper left-handiguide rolls 10- and lowerright hand guide rolls ll for the lower and upper- -aprons-.9..an d..11, respectively,

are mounted close totheir respective drying freely exposed onboth sidesa-vertical distance from one drier to another about equal to that.between the axes of the upper and lower driers. The free space on bothsides of the exposed web permits the vapor, which would otherwise beimprisoned to a large degree by the aprons with the web, to escape andthus advances the drying operation.

After the ribbon has been started through the machine as described, aweb of fullwidth is formed and the normal operation of the machineensues. After the paper is. running through the machine, the doctors 40and 42-are preferably moved to a retracted position (or if desired onlydoctor 42 is so moved) such 'as indicated in dotted lines in connectionwith doctor 42 in Fig. 3.

Any of the devices well known by those skilled in the art may be appliedto hold the doctor 42 against the drier and to hold it. in

retracted position.

In the normal operation of the machine an improved arrangement ofstructure is, provided to clean'the drier cylinders 11 and 12 of theforeign matter, which ordinarilv gathers as a fine film upon theperiphery of the cylinders. -The preferred structure is best shown inFigs. 3 and land comprisesa doctor blade 50 bent into substantially theform shown to form an open-ended trough. The blade 50 is secured toahorizontally arranged sleeve 51 which in turn is rotatably mounted onapipe 52 extending entirely across the machine as shown in Fig. 4. Thecontacting portions of the blade 50 and sleeve 51 are perforated, andthese perfora-- tions register with openings in the pipe The latter isconnected at one end to a suit-.55." able vacuum pump, and at the otherend is provided with a valve 53. In operation the blade 50, v heldagainst the drier" Thy the weighted arm shown in Figs. 3 and 1- re- 115moves the film of dust and lint from the drier and allows it to pass'into theopenended trough This film, which ,collects upon the roll, isextremely finelydivided material, and, in consequence, it passes.,1, 0freely through the perforations int'o )ipe' 52.

' The valve 53 may be suitably adjusted to cause in connection with thevacuum pump a rush of air through the pipe, which sweeps I the finelydivided material away, or, if desired, the valve may be closed offentirely leaving the removal of material to the suc l tion throughopenings 51 alone. It will thus i be seen that the material removedbythe blade 50 is prevented from accumulating,- 0

drawing ,the freely exposed web 6. Thus, the dryas heretofore possiblewith the usual doctor, to form a mass, which may fall upon or betweenthe web and, apron to damage either or both.

Another important and advantageous feaing operation is advanced bytheuse of this improved construction and arrangement.

' In addition to the features above described, the improved arrangementof drying cylinders is of advantage in that a considerable amount offloor space is saved by mounting each pair of driers substantially oneabove the other. Where driers are arranged as heretofore in staggeredrelation, the space of at least one cylinder is necessary for a givennumber of driers, in excess of the space required for the improvedarrangement described.

It has not been thought necessary to describe the driving connectionsfor the several parts, the frameA, the pipe connections, etc., or thespecific manner of mounting them in the machine. From the drawings anddescription disclosed, one skilled in the art can readily put theinvention into use. I

The invention is defined in its proper scope by the appended claims.

What I claim is- '1. In a paper making machine, the combination of a setof drying cylinders, aprons .therefor, means to guide the web to thedriers, the apron on web against the drier until it reaches a pointwhere it travels substantially horizontally on the upper surface of thedrier, means to strip the web from the bottom drier, the apron on acompanion top'drier being arranged to form with its drier an entrance inline with the substantially horizontally traveling web stripped from thelower drier, whereby the web is transferred automatically from a lowerto an upper drying cylinder.

- 2. In a paper making machine, bination of a set of drying cylinders,an

. apron for the lower tier of cylinders and an apron for the upper tierof cylinders, means to guide the aprons to and from the cylinders,whereby the web has a very short exposed trav el'in passing from a lowerto an upper cylinder and a comparatively long exposed travel from anupper to a lower cylabottom drier being.

the cominder, whereby the vapor may escape from the surface of the webin its long travel and the web may be readily fed from one cylindertoanother.

3.; In a paper making machine, the combination with upper and lowerdrying cylinders, aprons therefor, means to guide the latter to and fromthe cylinders, sothat the web in passing from one cylinder to another isexposed on both sides for a portion of its travel,'and means on eitherside of the exposed portion of the web to removethe moisture laden airand thus advance the drying operation.

' 4. In a papermaking machine, the combination of sets of companiondrying cylinders, the horizontal axes of the cylinders in each set beingsubstantially in the same vertical plane one with the other, an apronfor the lower cylinders and an apron for the upper cylinders, guidingmeans to direct the apron to an upper cylinder in a line sub-,stantially radial with respect to its companion lower cylinder and todirect the apron away from the upper cylinder to the adjacent uppercylinder in a substantially common tangent line, and guiding means todirect the apron to and from the lower cylinders in just the reversemanner.

5. In a paper makingmachine, the combination of a set of dryingcylinders, an apron for a lower tier of driers and an apron for an uppertier of driers, the apron on a lower drier arranged to hold the webagainst the drier until it reaches a point where it travelssubstantially horizontally on the upper surface of the drier, the apronon a companion upper drier being arranged to form with its .drier anentrance for the substantially horizontally traveling web, and means toloosen the web from the lower drier and direct the same into saidentrance, whereby the web is transferred -automatically from a lower toan upper drying cylinder.

6. In a paper making machine, the combination of a set of upper andlower drying cylinders, aprons therefor, means to guide the web to thedriers, the apron on the bottom drier arranged to holclthe web againstthe drier until it reaches a point where it travels substantiallyhorizontally on the upper surface of the drier, the apron on a companiontop drier being arranged to form with its drier 'an entrance in linewith the substantially horizontally traveling web, and means to stripthe web from the bottom drier and force the same into said entrance,whereby the web may be transferred automatically from a lower to anupper drying cylinder.

7 In a paper making machine, the combination of a set of upper and lowerdrying cylinders, an apron for the upper tier of cylinders, means toguide theaprons to arranged and from the cylinders, whereby the web hasa very short exposed travel in passing from a lower to an upper cylinderand a comparatively long exposed travel in passing from an upper to alower cylinder,

8. In a paper making machine, the combination of sets of companiondrying cylinders, the horizontal axes of the driers in each set beingsubstantially in the same vertical plane one with-the other, an apronfor the upper driers and an apron for the lower drier-s, the apron on'an upper drier being arranged to hold the web to the drier until itreaches a point'where it travels substantially tangential to a lowerdrier in the next set of cylinders, means to loosen the Web and throw itaway from the upper drier, 5

the apron on a lower drierarrangedto form with its drier an entrance inline with the traveling web stripped from the upper drier, whereby theweb is transferred au-,

tomatically from an upperdrier-in one set to a lower drier in the nextset. I 9 In a paper making machine,-the-com- I bination of a set ofdrying cylinder's,'an

apronfor the upper tier of cylinders andv I an apron forthe lower tierof cylinders,

' means to; guide said aprons whereby-a web is prevented from falling inanaccurnulate mass upon the web or the felts.

is transferred automatically from one drier to. another, doctors forsaid cylinders,and a trough-shaped device for each cylinder arranged 'incombination with its doctor, to collect and removeany-material adheringto said cylinders after the web has been stripped therefrom, wherebysaid material 10. In a paper making machine,thecombination of a set ofdryin cylinders, an apron for the upper tier of cylinders and i an apronfor the lower tier of cylinders,

means to guide the aprons to and from the cylinders'arranged so that theweb has a very short exposed travel in passing from a lower to an uppercylinder and a comparatively long travel in passing from an. upper to alower cylinder, whereby the vapor may escape :from the surface of theweb in its long travel, and means located on either side of the exposedportion of said. web to removethe moisture laden air and thus ad- .vancethe drying operation.

3112111 a machine of the class described,

the, combination of upper and lower; drying cylinders, apronsthereforpmeans to guide the latter toand from said cylinders, ar-

ranged topermitf'a web to pass from one cylinderto another with bothsides exposed fora portion of it's travel, whereby the Vapormayescapefroni the surface of the web, and means on either side of theexposed portion of the latter to remove the saturated airfrom andcauseca circulation of air about the exposed portion of the web toadvance the drying operation.

12.--'In a machine-0f the class described,

the combination of upper and lower drying cylinders with apronstherefor, a. doctor mounted to bear temporarily against an uppercylinder to strip the web therefrom at a point above its entrancebetweenithe lower cylinder and its apron, asecond doctor arranged belowthe first doctor to permanently bear against the cylinder and providedwith a collecting trough, and. means for automatically removing thecollectedmaterial from" the trough.

18. In awpaper making machine, a series of drying cylinders, a series ofcollecting.

troughs associated therewith, each having a doctor extending from oneedge thereof, p pesconnecting all the troughs in said series, and a-pneumatic means connected to said pipes and operable'to' remove thematerial as it collects'in said troughs. 14. In a paper making machine,the combination of two horizontal sets of drying cylinders arranged oneset above the other, the several cylinders in-one'set having their axesarranged respectively in. substantially the same vertical plane with theaxes of the several companion cylinders in the other set, an. apron forthe lower cylinders, an apron for the upper cylinders, guiding anddriving means' for said aprons, whereby they are caused to travelsynchronously with. the

' drying cylinders and in such relation thereto as to carry the paperweb around said cylinders, 1a doctor for each of thelower cylindersarranged to engage the upper portion of its cylinder to strip the papertherefrom and direct it. to the bight between the upper apron and thecompanion upper cylinder, and a doctor arranged to engage each of theupper cylinders to. strip the web therefrom and permit it to passdownwardly.

CHARLES E. POPE.

